Schedule of Mineral Properties and Development Costs (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Mineral properties and development costs	$ 30,586	$ 30,586
Alaska, USA [Member]
Acquisition costs	0	0
Mineral properties and development costs	30,586	30,586	30,586
Ambler Property [Member] | Alaska, USA [Member]
Acquisition costs	0	0
Mineral properties and development costs	26,586	26,586	26,586
Bornite Property [Member] | Alaska, USA [Member]
Acquisition costs	0	0
Mineral properties and development costs	$ 4,000	$ 4,000	$ 4,000